What Is a Network as It Relates to Postmodern Society

What is a network as it relates to postmodern society?

A) Arguably a new type of social structure that replaces earlier, hierarchical, forms of social structure exemplified by the welfare state.
B) A way of organizing social actors towards goals and the means to achieve these goals.
C) A close knit group of friends that serves as a support group in absence of a nuclear family.
D) Both a and b, but not c
E) None of the above